:root {
  /* Light theme palette */
  --bg: #f7f9fc;
  --panel: #ffffff;
  --panel-2: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --primary: #2563eb;
  --danger: #dc2626;
  --border: #e2e8f0;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body.app-body { margin: 0; background: var(--bg); color: var(--text); font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", Helvetica, Arial, sans-serif; }

/* Sidebar */
.sidebar { position: fixed; top: 0; left: 0; width: 240px; height: 100%; background: var(--panel); border-right: 1px solid var(--border); padding: 20px 16px; display: flex; flex-direction: column; gap: 16px; }
.brand { font-weight: 700; letter-spacing: .5px; }
.nav { display: grid; gap: 6px; }
.nav-link { display: block; color: var(--muted); padding: 10px 12px; border-radius: 8px; text-decoration: none; }
.nav-link:hover { background: var(--panel-2); color: var(--text); }
.nav-link.active { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); }
.logout-form { margin-top: auto; }

/* Content */
.content { margin-left: 240px; padding: 24px; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.alert { padding: 10px 12px; border-radius: 8px; margin-bottom: 12px; }
.alert.success { background: #123a20; color: #b2f0c7; border: 1px solid #1c6a3e; }
.alert.error { background: #3a1212; color: #f0b2b2; border: 1px solid #6a1c1c; }

/* Buttons */
.btn { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); padding: 8px 12px; border-radius: 8px; cursor: pointer; display: inline-block; }
.btn:hover { filter: brightness(1.06); }
/* Ensure anchor buttons never show underline */
.btn, .btn:link, .btn:visited, .btn:hover, .btn:active { text-decoration: none; }
.btn-primary { background: var(--primary); border-color: #2a60c0;color: white; }
.btn-danger { background: var(--danger); border-color: #b02727; color: #ffffff; }
.btn-outline { background: transparent; border-color: var(--border); color: var(--muted); }
.btn-block { width: 100%; }
.btn-icon { width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center; padding: 0; font-size: 16px; }
.btn-icon svg { width: 18px; height: 18px; }
.inline { display: inline-block; }
.text-right { text-align: right; }

/* Kanban */
.kanban { display: grid; grid-template-columns: repeat(2, minmax(260px, 1fr)); gap: 16px; }
.kanban-column { background: white; border: 1px solid var(--border); border-radius: 12px; display: flex; flex-direction: column; max-height: calc(100vh - 160px); }
.kanban-header { padding: 12px; font-weight: 600; border-bottom: 1px solid var(--border); background: var(--panel); }
.kanban-list { padding: 12px; overflow-y: auto; display: grid; gap: 10px; background: var(--panel); }
.kanban-footer { padding: 12px; border-top: 1px solid var(--border); }
.empty { color: var(--muted); font-style: italic; }

.card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 12px; display: grid; gap: 8px; }
.card.dragging { opacity: 0.6; }
.card.placeholder { border: 2px dashed var(--border); background: #f3f4f6; height: 60px; }
.card-title { font-weight: 600; }
.card-meta { color: var(--muted); display: flex; gap: 12px; flex-wrap: wrap; }
.card-meta .overdue { color: var(--danger); }
.card-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.status-form select { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 6px; }

/* Table */
.table { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.table th, .table td { padding: 12px; border-bottom: 1px solid var(--border); }
.table th.actions, .table td.actions { text-align: center; }
.table thead th { background: var(--panel-2); text-align: left; }

/* Modal */
.modal { position: fixed; inset: 0; display: none; place-items: center; background: rgba(0,0,0,.5); }
.modal[aria-hidden="false"] { display: grid; }
.modal-dialog { width: min(720px, 92vw); background: var(--panel); border: 1px solid var(--border); border-radius: 12px; }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 8px 16px; border-bottom: none; }
.modal-body { padding: 8px 16px 16px }
.modal-footer { display: flex; justify-content: flex-end; gap: 8px; padding: 12px 16px; border-top: none; }
.modal-close { background: transparent; border: none; color: var(--muted); font-size: 20px; cursor: pointer; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
label { display: grid; gap: 4px; color: var(--muted); }
.modal-header h3 { margin: 3px; }
input, select, textarea { background: #ffffff; border: 1px solid var(--border); border-radius: 8px; color: var(--text); padding: 8px; }
textarea { min-height: 80px; }
.form-actions {
    margin-top: 20px !important;
}

/* Badges */
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; line-height: 1; background: var(--panel-2); color: var(--muted); border: 1px solid var(--border); margin-left: 8px; }

/* Login */
body.login-body { display: grid; place-items: center; background: var(--bg); }
.login-card { width: 400px; background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.login-title { margin: 0 0 12px 0; text-align: center; }
.login-form .form-row { display: grid; gap: 6px; margin-bottom: 12px; }
.login-hint { color: var(--muted); font-size: 12px; }

/* Responsive */
@media (max-width: 1024px) {
  .kanban { grid-template-columns: repeat(2, minmax(260px, 1fr)); }
}

@media (max-width: 768px) {
  /* Layout */
  .content { margin-left: 0; padding: 16px; }
  .sidebar { position: static; width: 100%; height: auto; border-right: none; border-bottom: 1px solid var(--border); padding: 12px 16px; }
  .nav { display: flex; gap: 6px; overflow-x: auto; }
  .logout-form { margin-top: 0; margin-left: auto; }

  /* Page header */
  .page-header { flex-direction: column; align-items: flex-start; gap: 8px; }

  /* Kanban */
  .kanban { grid-template-columns: 1fr; }

  /* Forms/Modals */
  .grid-2 { grid-template-columns: 1fr; }
  .modal-dialog { width: 96vw; }

  /* Tables */
  .table { display: block; overflow-x: auto; }
}

@media (max-width: 480px) {
  .btn { padding: 6px 10px; }
  h1 { font-size: 22px; }
  .kanban-header { padding: 10px; }
  .card { padding: 10px; }
  .btn-icon { width: 28px; height: 28px; }
  .btn-icon svg { width: 16px; height: 16px; }
}